Valve has announced that the new free downloadable content for Portal 2 will be available through Steam, Xbox Live and PSN as of October 4. In Portal 2: Peer Review the user and a friend can go with the story of P-Body and Atlas and into a new test in cooperative mode where they will come into contact with GlaDOS.

Downloadable materials has two more additions, a new single-player and cooperative "Tournament Mode" as well as markers to compare the scores of the latter mode with friends and other players at the community portal.

No waiting for that is it has so long until the next week, which will be distributed when the update, Valve has released the latest installment of the soundtrack for Portal 2, Songs to Test By.